also vin·e·gar·roon V0106000 (vĭn′ĭ-gə-ro͞on′)n. A large whip scorpion (Mastigoproctus giganteus) of the southern United States and Mexico that emits a vinegary-smelling spray when disturbed.[American Spanish vinagrón, from Spanish vinagre, vinegar, from Old Spanish, from Old French vinaigre; see vinegar.]